Charles dustin hunking



(No Model.)-

0. 1). ,HUNKINGQ PUSH BUTTON- Patented Jan. 2, 1 8

UNITED STATES ATENT OFFICE.

CHARLES DUSTIN HUNKING, OF NEW YORK, N. Y.

PUSH-BUTTON.

SPECIFICATION forming part of Letters Patent No. 511,953, dated January2, 1894.

Application filed January 6, 18 93. Serial No. 457,571- (No model.) I

v To all whom it may concern.-

Be it known that 1, CHARLES DUSTIN HUNK- ING, a citizen of the UnitedStates, residing at New York, in the county of New York and State of NewYork, have invented a new and usefullmprovementinPush-Buttons, of whichthe following is a specification.

My invention relates 'to improvements in electric push buttons, oranalogous signaling apparatus, in which the electrical circuit is openedor closed by the action of two metallic points, or of other conductingmedia, and consists in combining with the mechanism of the saidapparatus, an electric current indicator,

and in providing the plate which covers thesaid mechanism, or the knobor actuating device thereof, with a transparent opening or window,through which the indicator may be observed.

The object is to indicate to the operator of the push button, when thecircuit is closed, whether a current passes or not, in a simple andconvenient manner. This object I attain by means of the mechanismillustrated in the accompanying drawings, in which Figure 1. is -a pushbutton with its plate containing the opening or window, through which isseen the indicating device, represented with the circuit open. Fig. 2.is the same, with the plate removed, showing the indicator with thecircuit closed. Fig. 3. is a vertical section of Fig. 2, with thecircuit open. Fig. 4. is a push button with its plate, showing theopening or window in the knob, through which the indicating device maybe seen, represented with the circuit open. Fig. 5. is the same, withthe plate removed, and showing the indicator with the circuit closed.Fig. 6. is a vertical section of Fig. 5.

Similar letters refer to similar parts throughout the several views.

B represents a push button, to be used in an electrical circuit. Theframe workb'. supports the metallic plated. and the metallic spring 19.,on which rests the knob P.

M. is the insulated coil and m. the core of an electro-magnet, connectedin the circuit by-the wire e., and to the terminal plate a, by the wirea. and the binding screw d.

C and 0'. represent the negative and positive wires of the circuit.

O is connected to the terminal spring 19, by the insulated wire 0' andthe binding screwf.

1. represents a transparent opening or window, (which may be coveredwith glass or other transparent substance) in the plate I). of the pushbutton, or in the knob P. of the same, and through which the pivotedindicating needle 11, may be seen. This needle may be made heavier atone end than at the other, in order that it may return by gravity, afterdeflection, to its former position. A solenoid may be substituted forthe electro-magnet.

The indicator may be rendered visible in the dark by covering the needleor its background with luminous paint. When several push buttons are inone plate, a single indieating device may be used for all.

On pressing the knob P., the springp. comes in contact with the plate a.and closes the circuit. The current passing through the coil M,magnetizes the core m. and deflects the needle. When the pressure on theknob is removed, the circuit is opened and the needle returns to itsformer position. I

\Vhat I claim as my invention, and desire to secure by Letters Patent,is-

A push button or circuit closer, comprising circuit terminals, atransparent opening, a pivoted index needle in or below the same, and anelectro-magnet in the circuit of the terminals for operating the needle,substantially as described.

CHARLES DUSTIN I-IUNKING.

WVitnesses:

THOS. AULD, J12, WILLIAM H. AULD.

